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  • 简介:摘要目的探讨结直肠癌中错配修复蛋白缺陷(dMMR)与NTRK基因融合的相关性。方法收集南京大学医学院附属鼓楼医院病理科2015—2019年诊断为结直肠癌的组织蜡块830例,分别运用免疫组织化学和荧光原位杂交(FISH)检测830例甲醛固定石蜡包埋(FFPE)肿瘤组织中错配修复蛋白表达情况以及NTRK1/2/3基因断裂情况。比较dMMR型和错配修复蛋白无缺陷(pMMR)结直肠癌中NTRK1/2/3基因融合的发生率,进一步运用FFPE样本进行RNA Seq二代测序检测,分析融合伴侣和融合方式。结果830例原发性结直肠癌FFPE样本均成功进行免疫组织化学和FISH检测。dMMR病例82例(9.88%),pMMR病例748例(90.12%)。其中MLH1蛋白缺失比例为9.04%(75/830),PMS2蛋白缺失比例为9.04%(75/830),MSH2蛋白缺失比例为2.53%(21/830),MSH6蛋白缺失比例为4.10%(34/830),MLH1和PMS2共缺失比例为8.67%(72/830),MSH2和MSH6共缺失比例为2.17%(18/830)。伴有dMMR肿瘤与pMMR肿瘤相比较,在发生部位、组织学分型、分化程度、美国癌症联合会(AJCC)分期、N分期及NTRK基因融合的发生频率上差异有统计学意义(P<0.05)。在82例dMMR的病例中共检测到6例(7.32%)携带NTRK基因融合;而在748例pMMR的病例中共检测到7例(0.94%)携带NTRK基因融合。二代测序进一步证实13例FISH检测阳性的病例均为携带了NTRK基因融合,NTRK基因融合阳性组仅在分化程度上与融合阴性组差异有统计学意义(P<0.05)。结论在原发性结直肠癌中,携带dMMR的肿瘤其NTRK基因融合的比例远高于pMMR的肿瘤。

  • 标签: 结直肠肿瘤 DNA错配修复 NTRK基因融合
  • 简介:Thestabilityofasubmarinepipelineontheseabedconcernstheflow-pipe-soilcoupling,withinfluentialfactorsrelatedtotheoceanwavesand/orcurrents,thepipelineandthesurroundingsoils.Aflow-pipe-soilcouplingsystemgenerallyhasvariousinstabilitymodes,includingtheverticalandlateralon-bottominstabilities,thetunnel-erosionoftheunderlyingsoilandthesubsequentvortex-inducedvibrations(VIVs)offree-spanningpipelines.Thispaperreviewstherecentadvancesoftheslip-linefieldsolutionstothebearingcapacity,theflow-pipe-soilcouplingmechanismandthepredictionforthelateralinstability,themulti-physicalcouplinganalysisofthetunnel-erosion,andthecouplingmechanicsbetweentheVIVsandthelocalscour.Itisrevealedthatthemechanismcompetitionalwaysexistsamongvariousinstabilitymodes,e.g.,thecompetitionbetweenthelateral-instabilityandthetunnel-erosion.Finally,theprospectsandscientificchallengesforpredictingtheinstabilityofalong-distancesubmarinepipelinearediscussedinthecontextofthedeep-wateroilandgasexploitations.

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